secondary

secondary

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  1. sythai

    Secondary loop pump + pipe stat

    Hi Guys Recently finished a new build house. Commissioning engineer came in the other day (2nd visit whilst I wasn't there) and mentioned we need to put a pipe stat on the secondary loop pump. We've only ever wired these as on/ off time controlled. Apparently it's regs (heating engineer we...
  2. Retroelectric

    Nest E installed as secondary stat?

    Hi guys, Do you know if I can install a Nest E with the heat link in the airing cupboard as opposed to the room stat position? System is a S plan with one heating zone, 2 channel programmer and room stat. Was hoping to put the heat link in the airing cupboard, pick up a permanent live and take...
  3. N

    Automatic Transfer Switch Back Up Source

    When an automatic transfer switch operates (solar has stopped generating) does it matter if the the secondary power source is not present (until economy 7 kicks in) at the time of switching?
  4. T

    Secondary consumer unit from SWA cable

    All of the work described below will be completed by a qualified electrician, I am just curious and using the info for planning!! I am planning a garage conversion. While I was bringing across services for water/gas etc I laid a 16mm2 3 core SWA between the main dwelling and the garage (all at...
  5. F

    Neutral from secondary side of a transformer

    I had a question regarding the neutral wire on the secondary side of a transformer. When connecting H2 and H3 in series, H1 and H4 can be fed 480V to step it down to 120V. On the secondary side, I understand having to connect X4 and X2 together, and X3 and X1 together, putting them in parallel...
  6. J

    110v transformers and overload on secondary

    Just trying to try get my head round these 110v wall mounted transformer I have come across. How comes the second side is unfused? Is there any regs on this? I know the primary usually has has a thermal cut out (is this just purely so we cannot overload and draw too much from the...
  7. K

    Need Transformaer secondary voltage and amps rating

    I need a help from members. My transformer from JBL Sub Active woofer has failed.It 230 V primary and secondary no voltage details mentioned.It has five wires and center is ground. In Service manual indicates ,First set two wires after bridge rectifier /Filter shows +15vdc,-15vdc (capacitor 35v...
  8. L

    UK secondary gas meter

    Does secondary gas meter to be earthed .
  9. M

    Secondary Transformer Circuit Breaker

    Hi, I'm just curious about what will happen if I use an MCB lower than the calculated current rating. I have a 1kVA 220v stepdown to 110V transformer, calculated downstream MCB current rating would be 11.3625 if i'm right I multiplied the secondary current to 125%? what will happen if I use a...
  10. H

    Should garage have secondary consumer unit? + Best way to extend power from garage to shed?

    A dedicated 20A type C MCB located in the consumer unit in my house feeds power to my detached brick-built double garage via an underground armoured cable. This MCB is one of a group that is controlled by an 80A RCD. There is no additional MCB protection within the garage. The incoming...
  11. bigspark17

    Secondary return hot options. Which way would you do it

    Have a house to 2nd fix which has a hot water loop system off the immersion this has a pump onit ready for me to utilise. Standard system boiler set up. Option 1 Install timeclock adjacent to pump. Option 2 Install timeclock and pipe stat so that once the water has looped around once the...
  12. S

    Simple relay for secondary pump circuit

    I am looking for guidance on adding a second pump for the underfloor section of my central heating. I am using a blending valve for the UFH supply by teeing off the main boiler feed into the 3 way valve and then to the pump and UF circuit valves (2). I am ok with the wiring I simply need a relay...
  13. G

    Strange Waveform on Secondary of Mains Transformer

    Hi Folks, Although I'm not an electrical engineer, I've registered on this site in an effort to seek some advice regarding a strange "240v mains" issue I'm seeing in my work shop - I will explain. The problem first came to my notice whilst trying to locate a 100Hz buzz on my amplifier. I traced...
  14. T

    Electrician Jobs Installing a secondary consumer unit in the garage??

    Morning all, I am looking to install a secondary consumer unit in my garage, linking from my existing house consumer unit. The first question is If it is ok to run 16mm2 Twin and earth SWA through my hallway and lounge concrete floor in order to get to the garage or should I be running it...
  15. S

    Delta-Wye Transformers

    Hi Guys, I'm looking for some information or diagrams on Delta-Wye transformers. Most diagrams that I have got, give me information for 3 lines to a Delta configuration then on the secondary side you get the Star configuration. I am really happy with the above concept, I would like to...
  16. C

    VT secondary Earthing

    I have seen a wye grounded - wye (b phase grounded) Potential transformer. Can anyone explain why B phase is grounded?
  17. D

    Mk K3561WHI 2-G TV FM/DAB SAT Triplexer and BT Secondary WALL SOCKET

    Mk K3561WHI 2-G TV FM/DAB SAT Triplexer and BT Secondary WALL SOCKET
  18. D

    MK K3560DABWHI 2-GANG TV FM DAB DIPLEXER PLUS BT SECONDARY WALL SOCKET

    MK K3560DABWHI 2-GANG TV FM DAB DIPLEXER PLUS BT SECONDARY WALL SOCKET Brand New £6 each plus postage £3 4 @ £20 free 5 @ £23 free 6 @ £25 free
  19. G

    Data point as phone point

    Can I use a standard data module as a phone point ? Cheers
  20. M

    Trainee asking for an explanation on something I found today (arcing cable)

    Hey there folks, just to let you know I am only a trainee, not actually started my NVQ yet but been working with most aspects of the trade for about 6 months now. Today I was working on the roof of a cinema replacing some emergency lights. Whilst up there the spark I am working under...

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